Budget Insurance - continuous issue not resolved

I posted a complaint about Budget recently, I was quite surprised to be contacted back almost immediately. However, I am still struggling to get a proper answer to my query. The consultant and myself are having a back and forth with no resolution in sight. I asked to speak to a Manager, but it seems the consultant is hesitant to give me a name. This is my problem: I live in a complex and I did not know that I did not have to pay for building insurance because it is covered by the BC Insurance. I was paying double insurance on my unit! I requested that budget refund me the money but they have all sorts of excuses. They said that it was up to me to inform them (sadly, I did not know). Surely as an insurance company they should know that if a prospective client supplies an address in a complex, they should inform such client that building insurance is not required because it is covered by the body corporate? Now they want documents that are not older than 30 days to prove that my unit specifically was insured with the BC. How does one submit such a document for one unit alone? A body corporate insurers the entire complex and from the documents that I received it does not individually state each unit in the complex. Besides how do I now get a current letter/document from our managing agent/BC insurance company stating that my unit was insured for the years 2022/23; 2023/24 and 2024/25. Myself and budget are now at a stalemate. In essence I have wasted money for three years paying double insurance for my property. Is anyone else experiencing the same issue as me? If a manager or higher authority of Budget is reading this statement please contact me directly!!! If I continue to "hit a brick wall" I will take the matter to the Ombusman. PS: What makes this situation so ridiculous is that last week I received a call from a budget agent offering me building insurance (I cancelled it at the end of August 2025). I was shocked! Have no words ...